NAQWA provides a very simple, very lightweight easy to use water purification. If you are bugging out and have a 72 hour pack with food and water, what happens after the 72 hours. You can live with out food for 3 weeks. You can only survive 3 days with out water. When you run out of water and have used up your water purification tablets, you had better have a way to purify water that you come across. This is YOUR ANSWER. Order now under the Water tab at www.weathervanesurvivalsupplies.com for only $68.00 which does include the shipping. Take advantage of Seezle at checkout to split up your payments, interest free with NO credit check!!